Steam-reheater.



no. 650,lll. Patented May 22, moo.

A. n. a. w. T. MARSH.

STEAM REHEATER. (Application filed Aug. 31, 1899.)

(No Model.)

Fig. 1

Fig.3 F 4 0 001% o 0 Z 0 o o: 0

Inventors,

fllonzo B.Marsh,

Marsh;

the atmosphere from the second cylinder.

UNITED STATES PATENT OFFI E.

A LoNzo R. MARSH AND ILLIAM T, MARSH, or BROCKTON, MASSACHU- "sETTs,ASSIGNORS, BY MEsN ASSIGNMENTS, TO THE ECLIPSE AUTO- "MonILE COMPANY, orMArNE.

STEAM-REH EATER.

v SPECIFICATIQN forming part of Letters Patent No. 650,1 11, dated.22,1900;

. pp catio ed August 31,1899. Serial No. 729,043. (No model.) I

Tea whom it may concern.-

Be it knownthat we, ALONZO R. MARSH and WILLIAM T.- MARSH, citizens ofthe United States, residing at Brockton, in the county of Plymouth andState of Massachusetts, have invented a new and useful Steam- Reheater,of which the following is a full,

clear, and exact description.

In the motor-vehicle'which we manufacture we employ a high-pressuresteam-cylinderexhausting into a low-pressu re cylinder and reheat suchexhaust before it enters the second cylinder, thereby adding greatly tothe effi- --ciency of the engines and in addition prevent from theengine as an struction of a device for economically reheata saturatedexhaustfrom being thrown into Without this reheating the exhaust issuesobjectionably-visible vapor. p p

The object of this invention is the coningi the-exhaust from the firstcylinder.

Referring tothe drawingsforming part of this specification, Figure l isa vertical central section of the upper part of our boiler andof ourreheater applied thereto. Fig. 2 is a horizontal section of thereheater, and

.Figs. 3 and tare detail views of the means for closing and securingtogether the ends of the annulartube forming the body of our reheater. l

The boiler, as shown, is of the porcupine type, with its central chamber1 projecting a short distance above the tubes 2. About said-- 35-chamber and immediately above said tubes 'we place ourreheater, which isannular in form and with its inner diameter substan ,tiallycorresponding with the outer diameter of said chamber and with its outerdiameter substantially corresponding with the extreme boiler, the samejacket which surrounds the manner the surplus heat arising between thetubes 2 strikesthe reheaterand imparts thereto the .heat necessary forsuitably raising the temperature of the steamy passing to thelow-pressure cylinder.

As before stated, our rehcater is annular in form andis made from asingle length of rather large tubing 10, flattened in cross-sectiou andhaving its ends brought together to complete the circle, as shown inFig. 2. Ver tically through this reheater-body are inserted a largenumber of short tubes 11, made steam-tight by being expanded in theholes drilled in the tubing 10, designed therefor.

The ends of the tube 10 are not flattened, but are left cylindrical andinternally threaded, being tapped with right and left handthreads,respectively. These tube ends are brought together and at thesame time made steam-tight by means of the double plug having its endsoppositely threaded to fit the said lar reheater at one end of the tube10, and

the pipe 18 conducts the reheated steam therefrom to the low-pressurecylinder. In order for the steam to pass from the pipe 17 to thepipe'18, it must pass through the entire length of the tubing 10 andbetween the multitude of columnar tubes-11, and inasmuch as the heatfrom about the boiler is constantly ris ing through said tubes 11 thelatter are very hot and raise the temperature accordingly of the passingsteam.

By having the tube 10 flattened and the tubes 11 terminally expanded inthe same the high steam-pressure within said tube 10 serves to moretightly press the flattened sides into contact with such expanded endsand so insure the tightness of all the joints.

What we claim as our invention, and for which we desire Letters Patent,is as follows, to wit: g

1. In a steam-reheate'r, the combination of the flattened tubecurved'into the annular' form, means for closing its ends, steaminletand outlet pipes communicating with said tube at its respectiveends, and the-vertical tubes terminally secured in holesin the flat- 7 Itened sides of said 'en nular tube, substan inlet and outlet pipesconlmunicating'witli ially as SQtforth. said annular tube at oppositesides of sai- 2. In a reheater, the combination of the screw=p1u'g,substantially'as set forth. tube flattened throughout all its length ex-Intestimony that we claim the foregoing is 5 eept its ends, and bentinto an annular form, invention we have hereunto set our hands said endsbeing internally threaded with right this 26th day of August, 1899. andleft hand screwrthreads respectively; the i ALONZO RJ-MARSH.

plug'having its ends oppositely threaded to WILLIAM '1. MARSH.correspondltherewith,andhaving the wrench- Witnesses: 16 receivingcentral shoulder; the vertical tubes GUY H. HOLLIDAY,

V opening through said annular tube; and the -A. B. UPHAM.

